<template>
    <div class="login">
        <section class="form_container">
            <div class="manage_tip">
                <span class="title">企业商品采购管理系统</span>
            </div>
            <el-form :model="loginUser" :rules="rules" ref="loginForm" class="loginForm" label-width="60px">
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="loginUser.email" placeholder="请输入邮箱"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="loginUser.password" placeholder="请输入密码" type="password"></el-input>
                </el-form-item>
                  <el-form-item  class="captcha" label="验证码" prop="captcha" >
                    <el-input class="captchaInput" v-model="loginUser.captcha" placeholder="请输入验证码" type="captcha"></el-input>
                    <img class="captchaImg" src="/api/users/getCode" alt="captcha" @click="getCaptcha" ref="captcha">
                </el-form-item>
                <el-form-item>
             
                    <el-button type="primary"  @click="throttling()"  class="submit_btn">登  录</el-button>
                </el-form-item>
      
            </el-form>
        </section>
    </div>
</template>

<script>
import jwt_decode from 'jwt-decode'

export default {
  name: 'login',
  data() {
    return {
      loginUser: {
        email: '',
        password: '',
        captcha: '',
        timer2: null,
      },
      rules: {
        email: [
          {
            type: 'email',
            required: true,
            message: '邮箱格式不正确',
            trigger: 'change',
          },
        ],
        password: [
          { required: true, message: '密码不能为空', trigger: 'blur' },
          { min: 6, max: 30, message: '长度在 6 到 30 个字符', trigger: 'blur' },
        ],
        captcha: [{ required: true, message: '验证码不能为空', trigger: 'blur' }],
      },
    }
  },
  methods: {
    getCaptcha() {
      // 每次指定的src要不一样，img才会重新请求，可以使用Date.now()小技巧
      this.$refs.captcha.src = '/api/users/getCode?time=' + Date.now()
    },
    submitForm(formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          this.$axios
            .post('/api/users/login', this.loginUser)
            .then((res) => {
              // 登录成功
              const { token } = res.data
              localStorage.setItem('eleToken', token)

              // 解析token
              const decode = jwt_decode(token)

              // 存储数据
              this.$store.dispatch('setIsAutnenticated', !this.isEmpty(decode))
              this.$store.dispatch('setUser', decode)

              // 页面跳转
              this.$router.push('/index')
            })
            .catch((err) => {
              // console.log(err.response.status)
              if (err.response.status == 400) {
                this.getCaptcha()
              }
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    isEmpty(value) {
      return value === undefined || value === null || (typeof value === 'object' && Object.keys(value).length === 0) || (typeof value === 'string' && value.trim().length === 0)
    },

    throttling() {
      if (this.timer2) return
      this.timer2 = setTimeout(() => {
        this.submitForm('loginForm')

        this.timer2 = null
      }, 300)
    },
  },
}
</script>

<style scoped>
.login {
  position: relative;
  width: 100%;
  height: 100%;
  background: url(../assets/bg.jpg) no-repeat center center;
  background-size: 100% 100%;
}
.form_container {
  width: 350px;
  height: 210px;
  position: absolute;
  top: 20%;
  left: 34%;
  padding: 25px;
  border-radius: 5px;
  text-align: center;
}
.form_container .manage_tip .title {
  font-family: 'Microsoft YaHei';
  font-weight: bold;
  font-size: 26px;
  color: #fff;
}
.loginForm {
  margin-top: 20px;
  background-color: #fff;
  padding: 20px 50px 20px 20px;
  border-radius: 5px;
  box-shadow: 0px 5px 10px #cccc;
}
.captcha {
  overflow: hidden;
}

.captchaInput {
  width: 120px;
  float: left;
}
.captchaImg {
  width: 90px;
  height: 40px;
  padding-left: 5px;
  display: block;
}

.submit_btn {
  width: 100%;
}
.tiparea {
  text-align: right;
  font-size: 12px;
  color: #333;
}
.tiparea p a {
  color: #409eff;
}
</style>


